大气环境影响预测中颗粒物模式(倾斜烟羽扩散模式)适用于排气筒排放的颗粒物粒径( )的污染物。
A.≥15μm B.>15μm C.>10μm D.≥10μm
参考答案:B
There is a peaceful and calm _____________ in the hall, and everyone seems to be in high spirits.
A.atmosphere
B.air
C.stage
D.performance
角膜异物取出时应遵循的原则
A.局麻下操作
B.严格无菌操作
C.要缝合角膜创口
D.局部点眼治疗
E.全身应用抗生素治疗